Basic implementation of incremental marking.

src/mark-compact.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 191 matching lines @@
     } while (cell_index < last_cell_index && cells[cell_index] == 0);
 
     // If we reached last_cell return limit
     // not the start of the last_cell because
     // limit can be in the middle of the previous cell.
     if (cell_index == last_cell_index) return limit;
 
     return FirstMarkedObject(page, cell_index, cells[cell_index]);
   }
 
-  static inline void TransferMark(Address old_start,
-                                  Address new_start) {
-    if (Heap::InNewSpace(old_start) ||
-        Page::FromAddress(old_start)->IsFlagSet(Page::IS_CONTINUOUS) ||
-        !IsMarked(old_start)) {
-      return;
-    }
-
-    SetMark(new_start);
-  }
+  static void TransferMark(Address old_start, Address new_start);
 
   static bool Setup();
 
   static void TearDown();
 
  private:
   class BitmapStorageDescriptor {
    public:
     INLINE(static int CellsCount(Address addr)) {
       return HeaderOf(addr)->cells_count_;
@@ skipping 164 matching lines @@
   friend class MarkingVisitor;
   friend class StaticMarkingVisitor;
   friend class CodeMarkingVisitor;
   friend class SharedFunctionInfoMarkingVisitor;
 
   static void PrepareForCodeFlushing();
 
   // Marking operations for objects reachable from roots.
   static void MarkLiveObjects();
 
+  static void AfterMarking();
+
+
   INLINE(static void MarkObject(HeapObject* obj)) {
     if (!Marking::TestAndMark(obj->address())) {
       tracer_->increment_marked_count();
 #ifdef DEBUG
       UpdateLiveObjectCount(obj);
 #endif
       ProcessNewlyMarkedObject(obj);
     }
   }
 
@@ skipping 132 matching lines @@
 
   friend class UnmarkObjectVisitor;
   static void UnmarkObject(HeapObject* obj);
 #endif
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_